CR has issued a prediction for PMA 2009, based on the rumors that they have received. PMA starts in about 3 weeks at the beginning of March, although a release of something is expected next week on February 17th/18th.
According to CR, a new Canon EF 150 f/2.8L IS Macro Lens is possible:
"I never reported on this lens because it seemed way far fetched. It makes sense to make a lens like this, I just donít think now is the time for it."
Again, this is their prediction based on rumors they have received.
Source: CR on 2/13/2009.